Antifriction bearing for gravity carriers



Poeh. 2U, W23..

H. J. BUCK ANTIFRICTION BEARING FOR GRAVITY CARRIERS Filed Apr'. 19,A1920 www5 rm.

atented Feb.. Il, I

HERMAN l1-BUCK, 0F ELLOOD CITY, PENNSYLVANIA, ASSIGNOR TO IIATEEEWS vGRAVITY CARRIER CCIIPANY, E EIJIWOOD CITY, PENNSYLVANIA, A CORIO- ".ION0E PENNSYLVANIA.

i .l IERICTION BEARING- ]EOR GRAVITY CARRIERS. i

, To all whom t may concern.'

Be it known that I, HERMAN QI. BUCK, a citizen of the United States,resident of Ellwood City in the county of Lawrence and State oflennsylvania, have invented certain new and useful Improvements inAntifriction Bearings for Gravity Carriers, of which the following is aspecification.

The present invention relates to improvements in anti-friction bearingsfor the rolls or conveyer members of gravity carriers, and is animprovement upon the bearing illustrated and described in Letters Iatentissued to me September 4th, 1917, No. 1,288,880.

The object of this invention is to simplify and make more convenient forassembling y and removal the construction disclosed in my former patent;to provide means for positively locking all parts of the bearingtogether; to provide means for deflecting dirt and dust away from thebearing, thereby Shielding and protecting the same when the carrier isin operation; to provide, in connection with the bearing, an oil pocketor receptaclewhich will hold a small amount of oil, and from whichpocket the oil will readily work through the bearing while the carrieris in opera-tion; and to provide a bearing in which all walls of theball race are hardened so that the b-alls are not in contact with anysoft metal surface.

Utherobjects of the invention will appear from ,the following detaileddescription.

The invention consists in various construc- .tions and combinations asherein described and particularly pointed out in the' claims. In theaccompanying drawings forming part of this specification,

Figure 1 is a transverse sectional view of a carrier with one of thecarrier rolls shown in `long ,ritudinal section, a portion of the middlepart of the roll beingibroken away. Figure 2 is a transverse section online 2-2 of Figure 1,

Figure 3 is a detail section of the bearing, Figure 4 is a section ofone end of the roll showing the recessed head seated therein,

Figure 5 is a detail showing a modified construction of the outer cup. y

Figure 6 is a detail showing the modified construction oftheinner cup.

In the drawing, 2, 2 represents the side rails of the carrier, havingslots 3 to receive the rods or axles 4f, of the rolls. These rods arepreferably secured in the rails by locking bars 5 through which passbolts 6 to fasten the bars 5 to the rails 2.

7 represents a conveyer or carrier roll, preferably made of light steeltubing and open at each end.

rIhe parts hereinbeforedescribed are substantially like thecorresponding parts in my former patent hereinbefore referred to.

A head 8, preferably secured as shown, 1s arranged in each end of theroll 7 and is secured therein by any suitable means, such as by centerpunching, riveting or welding. This head is preferably in the form of anannulus having the circular webs 9 and 10 united by a transverse web 11.As shown, the outer surface of the web 9 is preferably coincident withthe inner surface of the cylinder 7, so that said head may be seatedinthe end of the cylinder and fit snugly therein. The web 9 ispreferably provided with the turned-out flange 9 that butts against theend of the roll.

rIhe web 10 is preferably concentric with the web 9, to which it isunited by the web 11 formed integrally with the webs 9 and 10, as shownin the drawings. Preferably the web 10 is somewhat shorter than the web9 and the outer edge of the web 9 is preferably turned' down at rightangles so as to form a stop or shoulder which comes against the end ofthe roll when the head is inserted therein. Arranged between the web 10of the head 8 and the axle or rod 1 is a roller cage or race containinga series of balls which provide an anti-friction support' for said roll.'Ihe cage that I prefer to use is preferably formed of two meta-l cups12 and 13, the larger outer cup 12 fitting loosely within the head. 8with its outer wall in contact with the inner wall of the web 10 of saidhead. The bottoni of the cup 12 is formed by an inwardly extendingflange 14, having a central opening and its opposite edge is turnedoutward forming a narrow flange 15. The cup 13 corresponds in shape `tothe 4cup 12 and is nested therein, being provided with a bottom 16, alsohaving a central opening that is parallel to the bottom' 14 of the cup12, and with a flange y17 parallel to the flange 15 of the cnpf12. The

cup 13 is of less depth than the cup 12, so that when the cup 13 isnested in the cup 12, with its flange 17 in contact with the flange `15of the cup 12, an annular ball race is formed between the bottoms 14 and16 of .said cups.

I prefer -to provide a sleeve 18 that fits loosel upon the rod or axle 4and is capable of sliding 4longitudinally thereon. This sleeve passesthrough the openings in the bottoms of the cups and it has an annulargroove 19- arranged opposite the space between the bottoms of said cups.A series of balls 20 are provided in the ball race formed 15 betweensaid cups and the grooved portion of said sleeve.

The sleeve 18 and the two cups 12 and 13 are preferablycasehardened soas to form an annular ball race having all of its walls of hardenedsteel, thereby permitting the cage and supported roller to rotate uponthe sleeve 18 with a minimum amount of friction, andl also reducing thewear on the parts of said race to a minimum.

After the parts of the bearing are assembled with the balls extendinginto the annular groove 19 in the sleeve 18, the cups 12 and 13 arepreferably locked together by means of a disc of soft metal 21, having acentral opening for the pam-age of the sleeve 18 andy with its outeredge crimped or bent over". the flanges 15 and 17 of the nested cups,and then* bent inward so as to form a flange 22 -fitting against theunder surface of the .gsllange 1'5 of the cup 12.

The disc 21 not only locks the nested cups together, but it serves todeflect away from the bearing dust or dirt that might be thrown againstit. The space within the cup 13 and under the surface of theY plate 21,

.forms an oil pocket or receptacle into which oil may be inJectedandwhere it will be held and carried as the device rotates, a considerablelportion of the oil working into the ball space between the edge of thebottom-16 of the cup andthe enter surface of the sleeve 18, thereby'providing lubrication for said bearing. l The sleeve 18,' the cups 12and-13, the locking disc 21 and the series of balls 20 arranged in therace, form a self-contained ball-bearing or anti-friction unit that canbe independently assembled and which is readily brought into position inthe carrier by slip- 5`6 ping it over the end of the rod or axle 4, and

into the head'8 in the end of the cylinder or roll`7 When the bearing isthus brought into position in the carrier the cup 12 teleseopes vintothe head 8 fitting within" the flange 10 until the turned over part 22of the lockin'gfdisc 21 comes into contact with l the edge -f the flange10 of the head 8.

When y he rod 4 with the sleeve and bearing assembled thereon is put in'lace in the 66 carrier rails 2, and is locked4 in t is position by thelocking bar 5, the. parts cannot separate as longitudinal movement ofthe sleeve 18 is prevented by reason of the proximity of the end of thesleeve tothe inside of the rail 2.

When, however, it is desired for any purpose to take the bearing out ofthe roll, the locking bar 5 may be removed and the rod 4 lifted out ofthe notches or recesses in the rails 2. The unitary ball bearing maythen be drawn out of the head 8 and removed from the rod or axle bysliding the sleeve 18 longitudinally on said rod.

I find it unnecessary to provide any means for locking the ball bearingin the head 8, as the friction between the outer surface of the cup 12and the inner surface of the head cage will move with the head and roll,notwithstanding the fact that there is no positive connection betweenthe cup l2 and said head.

The sleeve 18 being free upon the rod 4 may turn thereon, and will do soto such an extent as to change its position on the rod, as pointed outin my said former patent.

While the general construction and arrangement of the parts in thisbearing is the.

same as in the bearing described in my said former patent, the presentconstruction is an improvement over my former bearing in that the nestedcups forming the ball race are secured together by means of the softmetal locking plate having its edge turned over the flanges of saidcups. This locking plate may readily be removed, should the balls becomebroken or if for any other purpose it is desired to separate the cups.When the soft metal plate is removed the inner cup 13 may readily belifted out of the cup 12.

The locking plate also forms a protecting disc or cover for the bearing,and provides an oil receptacle or pocket in which a certain amount ofoil may be carried. his oil will work between the inner cup and the discand lubricate the parts of the bearing.

While I have illustrated and described balls as forming theanti-friction element of the bearing, it will be understood thatsuitable rollers or cylinders might be substituted for the balls withoutdeparting from my invention, and by the term balls as. used in thespecification and claims I include equivalent anti-friction rollers.

While I prefer to form both of the cups 12 and 13 of sheet metal stampedout by suitable dies I do not limit myself to this construction` InFigure 5 I have shown the cup 12 having a bottom 12 formed separatelyand secured in position in the lower end of the cup. In Figure 6 I haveshown the cup-13 in the form of an open cylinder withoutJ its upperflange, and the cup 12 with a shoulder 12 on its inner surface forming aseat for the cup 13.

rllhe details of the lconstruction may be varied in many particularswithout departing from my invention.

I claim as my invention:

1. An anti-friction bearing for gravity carriers comprising a sleeve, acage surrounding said sleeve and formed of flanged cups nested togetherwith a space between the bottoms of said cups, rotatable membersarranged in the race formed between the bottoms of said cups and saidsleeve, and means locking the flanges of said cups/together,substantially as described.

2. An anti-friction bearing for gravity carriers, comprising a sleeve, acage surrounding said sleeve and formed of flanged cups nested togetherwith a space between the bottoms of the cups, rotatable members arrangedin the race formed between the bottoms of said cups and said sleeve, anda locking plate extending across the inner cup and having its edge bentover the cup flanges and locking said cups together, substantially asdescribed.

3. A ball bearing for gravity carriers comprising a sleeve, a ball cagesurrounding said sleeve and formed of flanged cups nested together witha space between the bottoms of said cups, balls arranged in the raceformed between the bottoms of said cups and said sleeve, and meanslocking the flanges of said cups together. y

4. A ball bearing for gravity carriers cornprising a sleeve, a ball cagesurrounding said sleeve and formed of flanged cups nested together,balls arranged in the race between the bcttoms of said cups and saidsleeve, and a locking plate extending across the inner cup and havingits edge bent over the cup flanges and locking said cups together,substantially as described. i

5. The combination with an axle and a carrier roll having heads recessedaround said axle, of anti-friction bearings, each constituting aself-contained unit arranged on said'axle, and longitudinally movablethereonto engage it with or disengage it from said roll head. and eachbearing formed of a cage consisting of a pair of flanged cups nestedtogether with the open ends of the cups towards the ends of the roll,means securing the flanges of said cups together, and rotatable membersarranged in said cage and supporting said cage and thel roll head in`which said cage is seated.

6. 'llhe combination with an axle and a carrier roll having headsrecessed around said axle, of anti-friction bearings, each constitutinga self-contained unit arranged on said axle, and longitudinally movablethereon to engage'it with or disengage it from said roll head, and eachbearing formed of a cage consisting of a pair of flanged cups nestedtogether, a locking plate extending across the inner cup and having itsedge bent over the cup flanges and locking said cups together, androtatable members arranged in said cage and supporting said cage and theroll head in which said cage is seated.

7. The combination with an axle and a carrier roll having heads recessedaround said axle, of anti-friction bearings, each constituting aself-contained unit arranged on said axle, and longitudinally movablethereon to engage it with or disengage it from said roll head, and eachbearing formed of a cage consisting of a pair of flanged cups nestedtogether, and having the open ends of the cups towards the ends of therolls, a locking plate extending across the inner cup and having itsedges bent over the cup flanges and locking said cups together, androtatable members arranged in said cage and supporting said cage and theroll head in which said cage is seated.

8. An anti-friction bearing for gravity carriers, comprising a sleeve, acage surrounding said sleeve and formed of cups nested together with aspace between the bottoms of said cups, said outer cup being providedwith an outwardly turned flange, rotatable members arranged in the raceformed between the bottoms of said cups and said sleeve, and a lockingplate extending across said cups and having its edge bent over theflange of the outer cup and locking said cups together.

9. The combination with an axle and a carrier roll having heads recessedaround said axle, of anti-frictionbearings, each constituting aself-contained unit arranged on said axle and longitudinally movablethereon to engage it with or disengage it from said roll head and eachbearing formed of a cage consisting of a pair of cups nested togetherwith a space between the bottoms of said cups, the outer cup having aflange at its open end, a locking plate extending across said cups andhaving its edge bent over the flange of' the outer cup and locking saidcups together and rotatable members arranged in the race formed betweenthe bottoms of said cups and supporting said cage and the roll head inwhich said cage is seated.

10. An anti-friction bearing comprising an axle,a cage surrounding saidaxle, and formed of flanged cups nested together with a space betweenthe cup flanges and between the axle and the interior wall of one ofsaid lcups forming a race, anti-friction members arranged in the race, abearing for the outer cup. and means for locking the flangesof said cupstogether.

11. An anti-friction bearing comprising said disc forming with the cupand axle an an axle, a cage surrounding said axle, and oil cavity asshown and described. 10 formed of flanged'cups nested together With InWitness whereof, I have hereunto set a space between the cup flanges andbetween my hand this 9th day of April, 1920. the axle and the interiorWall of one of said HERMAN J. BUCK. cups forming a race, anti-frictionmembers Witnesses: arranged in the race and a soft metal disc CHEsLEY A.POND, for locking the flanges of said cupstogether, CLARA HEMON.

